logical paradox meaning in English

逻辑悖论

Logical paradox in hegel ' s idea of natural beauty
黑格尔自然美论的逻辑悖论
Studies of the generalized logical paradox and its outline of the function of social culture
广义逻辑悖论研究及其社会文化功能论纲
If there is a machine that enables us to go back to the past , then two kinds of logical paradoxes will be created
若有回到过去的时光机，便会产生两类逻辑上的矛盾。
Could knowledge be created out of nothing ? scientists cannot solve these logical paradoxes by laws of physics as at present understood . neither are they clear whether time machines are doomed to associate with such paradoxes
科学家没有解决这两类矛盾的方法，也不完全清楚这两个矛盾和时光机的关系，例如我们是否只可建造没有矛盾的时光机？